... API thread and other threads. Carbide PDC core bit with PDC picec, for ore or oil with ... synthetic diamond core bits, natural diamond surface-set core bit, PDC bits (core or noncoring), casing shoes, reaming ... standards, and used around the world in a great variety of applications. We are the member of the ... AQ-PQ, T2, T6 etc. Diamond core bit, reaming shell & shoe bit (syn. and surface-set, PDC)4. ...